Renesas 7134SA55J8

Overview

IDT7134SA55J8 from Renesas Electronics is a high-speed 4K × 8 dual-port static RAM with independent asynchronous left/right ports, 55 ns maximum read cycle time, TTL-compatible 5 V ±10% operation, and industrial temperature range (–40°C to +85°C). It enables real-time data exchange between two processors or bus masters in digital signal processing systems.

For engineers reviewing the IDT7134SA55J8 datasheet, IDT7134SA55J8 pinout, IDT7134SA55J8 application, or IDT7134SA55J8 equivalent, key selection criteria include dual-port arbitration-free access, 55 ns timing at industrial grade, low-power standby (5 mW typ.), and PLCC-52 package compatibility with legacy military/industrial designs.

Technical Context

The IDT7134SA55J8 implements fully asynchronous dual-port architecture with separate address, control, and I/O buses for left (L) and right (R) ports - no on-chip arbitration logic required. Each port features independent chip enable (CEL/CER), output enable (OEL/OER), and read/write (R/WL/R/WR) controls.

It supports battery backup data retention only in LA variants; the SA variant uses standard CMOS power profile (700 mW active, 5 mW standby). Timing is defined by tRC = 55 ns (max), tAA = 55 ns (max), and tAOE = 30 ns (max), all guaranteed over –40°C to +85°C.

Key Specifications

Pinout & Package

Package: 52-pin Plastic Leaded Chip Carrier (PLCC), JEDEC MS-026AC compliant, body size 19.05 mm × 19.05 mm × 4.32 mm.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-port SRAM applications.

Compared with CY7C1354V25-55AXI and AS7C34096A-55PCN, IDT7134SA55J8 uniquely delivers industrial-grade 55 ns performance in PLCC-52 with proven legacy qualification - essential for retrofitting aerospace and defense platforms where board layout and thermal validation are fixed.

Availability

IDT7134SA55J8 is available at Aetrix Electronics and suitable for digital signal processing co-processors, real-time video frame buffers, avionics data concentrators, and industrial PLC memory expansion requiring stable component supply across extended lifecycle programs.

Supply support for IDT7134SA55J8 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Renesas Electronics is a global semiconductor leader delivering microcontrollers, analog, power, and memory solutions for automotive, industrial, and infrastructure markets.

IDT7134SA55J8 belongs to Renesas' legacy dual-port SRAM product line, designed specifically for high-reliability, arbitration-free memory sharing between heterogeneous processors in mission-critical embedded systems.

FAQ

What is the operating temperature range for IDT7134SA55J8?

IDT7134SA55J8 is rated for industrial temperature operation from –40°C to +85°C. This range is validated per the datasheet's Recommended Operating Temperature specification and applies to all DC and AC electrical characteristics, including the 55 ns maximum read cycle time and 5 mW standby power consumption. The part does not support military or commercial-only grades.

Does IDT7134SA55J8 support battery backup data retention?

No, IDT7134SA55J8 does not support battery backup data retention. That feature is exclusive to LA variants (e.g., IDT7134LA55J8). The "SA" suffix denotes Standard Power configuration, which specifies 700 mW typical active power and 5 mW typical standby power - but no 2 V data retention capability. Retention functionality requires explicit LA designation in the orderable part number.

Which package type is used by IDT7134SA55J8?

IDT7134SA55J8 uses a 52-pin Plastic Leaded Chip Carrier (PLCC), designated PLG52 in Renesas' ordering nomenclature. The package has a 19.05 mm × 19.05 mm body and 4.32 mm height, with J-lead geometry conforming to JEDEC MS-026AC. Pin 1 is marked by a notch in the package corner, and all VCC/GND pins must be properly decoupled per the datasheet layout guidelines.

Can IDT7134SA55J8 operate with a 3.3 V supply?

No, IDT7134SA55J8 requires a 5.0 V ±10% supply (4.5 V to 5.5 V) and is not specified for 3.3 V operation. Its input thresholds (VIH = 2.2 V min, VIL = 0.8 V max) and output drive strength (VOH = 2.4 V min at –4 mA) are designed for TTL compatibility. Using 3.3 V risks violating VIH/VIL margins and invalidates all AC timing parameters, including the guaranteed 55 ns access time.

How is port contention handled in IDT7134SA55J8?

IDT7134SA55J8 provides no internal arbitration - it is the user's responsibility to prevent simultaneous writes to the same memory location from both ports. The datasheet explicitly states that data integrity during contention is not guaranteed. External hardware (e.g., semaphores, FPGA-based arbiter) or software protocols must enforce mutual exclusion. Truth Table I confirms that overlapping CE and R/W asserts result in undefined data states unless externally coordinated.